Results 21 to 30 of about 38,906 (246)
Shadow of rotating and twisting charged black holes with cloud of strings and quintessence
European Physical Journal C: Particles and Fields, 2023 Testing gravity theories is an important and interesting issue in relativistic astrophysics using astrophysical observations. In recent years, Event horizon telescope collaboration provided valuable data from shadow of supermassive black holes located at
Muhammad Zahid +4 more
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The birth of a supermassive black hole binary [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 12 pages, 12 Figures, submitted to ...
Pfister, Hugo +5 more
openaire +3 more sources
Shadow of a rotating squashed Kaluza-Klein black hole
Journal of High Energy Physics, 2019 We study the shadow of a rotating squashed Kaluza-Klein (KK) black hole and the shadow is found to possess distinct properties from those of usual rotating black holes.
Fen Long +3 more
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A Global Inventory of Feedback
Galaxies, 2023 Feedback from both supermassive black holes and massive stars plays a fundamental role in the evolution of galaxies and the inter-galactic medium. In this paper, we use available data to estimate the total amount of kinetic energy and momentum created ...
Timothy M. Heckman, Philip N. Best
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No Supermassive Black Hole in M33?
Science, 2001 We observed the nucleus of M33, the third-brightest galaxy in the Local Group, with the Space Telescope Imaging Spectrograph at a resolution at least a factor of 10 higher than previously obtained. Rather than the steep rise expected within the radius of gravitational influence of a supermassive black hole, the random stellar velocities showed a ...
David Merritt +2 more
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High-energy signatures of binary systems of supermassive black holes [PDF]
, 2016 Context. Binary systems of supermassive black holes are expected to be strong sources of long gravitational waves prior to merging. These systems are good candidates to be observed with forthcoming space-borne detectors.
Pérez, Daniela +2 more
core +3 more sources
The spin of supermassive black holes [PDF]
Classical and Quantum Gravity, 2013 Invited article accepted for publication in the focus issue on astrophysical black holes in Classical and Quantum Gravity, guest editors: D. Merritt and L. Rezzolla.
openaire +3 more sources
The first supermassive black holes [PDF]
Astronomy & Geophysics, 2017 We briefly review the historical development of the ideas regarding the first supermassive black hole seeds, the physics of their formation and radiative feedback, recent theoretical and observational progress, and our outlook for the future.
Abraham Loeb, Volker Bromm, Aaron Smith
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The Astrophysical Journal Letters, 2023 Pulsar timing array collaborations, such as the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), are seeking to detect nanohertz gravitational waves emitted by supermassive black hole binaries formed in the aftermath of galaxy ...
Zaven Arzoumanian +78 more
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Oscillating axion bubbles as alternative to supermassive black holes at galactic centers [PDF]
, 2006 Recent observations of near-infrared and X-ray flares from Sagittarius A*, which is believed to be a supermassive black hole at the Galactic center, show that the source exhibits about 20-minute periodic variability.
Anatoly A Svidzinsky +9 more
core +2 more sources